High-fluidity clay green molding sand used for steel casting and preparation method thereof

Abstract

The invention discloses high-fluidity clay green molding sand used for a steel casting and a preparation method thereof. The high-fluidity clay green molding sand is made from, by weight, 25-40 parts of zircon sand, 18-32 parts of chromite residues, 11-19 parts of petrol coke powder, 14-26 parts of rectorite, 5-10 parts of waste molasses, 15-25 parts of vermiculite, 33-47 parts of nacrite, 9-18 parts of white onxy, 5-10 parts of spinel, 7-11 parts of ultra-fine aluminum silicate, 5-10 parts of tricalcium phosphate and 320-380 parts of improver. According to the high-fluidity clay green molding sand used for the steel casting and the preparation method thereof, the zircon sand and the nacrite are adopted as the main ingredients, and the chromite residues, the petrol coke powder, the rectorite, the white onxy, the spinel and other raw materials are added, so that the prepared clay green molding sand is made to have excellent fluidity; sand grains can easily move towards one another under the action of external force or gravity; the high-fluidity clay green molding sand further has good plasticity, gas permeability, collapsibility and heat stability.

Description

technical field [0001] The invention relates to high fluidity clay green molding sand for steel castings and a preparation method thereof, belonging to the technical field of molding sand. Background technique [0002] Sand casting is the most common casting method, and molding sand is the most important molding material in the current molding process. Molding sand is generally made by mixing molding materials such as raw sand for casting, molding sand binder and auxiliary additives in a certain proportion. Castings produced with sand molds account for more than 80% of the total casting production. The quality of molding sand directly affects the appearance quality of castings and casting defects such as sand holes, pores, and sand inclusions. With the continuous development of casting technology, the performance requirements for molding sand are getting higher and higher. Currently, the molding sand used for steel castings in the market has the disadvantage of poor fluidi...

AI Technical Summary

Problems solved by technology

With the continuous development of casting technology, the performance requirements for molding sand are getting higher and higher. At present, the molding sand used for steel castings in the market has the disadvantage of poor fluidity, which affects the quality of steel castings.